Find the typical age range for a US school grade number.
Adding five-and-a-half years to the grade gives a mid-year age, with a one-year window around it reflecting normal variation. Parents planning birthday timing or grade starts often need to translate a grade into an expected age quickly.
School Grade Age
Typical age = grade + 5.5 years (US assumption)
Typical age = grade + 5.5 years (US assumption) Adding five-and-a-half years to the grade gives a mid-year age, with a one-year window around it reflecting normal variation.
Parents planning birthday timing or grade starts often need to translate a grade into an expected age quickly.
This calculator takes 1 input: Grade. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.